Originally Posted by
Difussion3
So I checked the oil in my car today and it looks clean. No milky or green color in it. But, I decided to open my radiator cap to see how much coolant was missing found these two pieces broken off the cap. A black piece laying on the bottom of the radiator opening and a spring. So what do you guys think?? Is this what is causing my problem??
That's the spring that is supposed to maintain pressure within the coolant system.
Since a head gasket leak is ruled out, I'd say you've solved it.
I'll bet the new radiator cap and proper coolant mix will do the trick.